Cool game great atmosphere and love the music and the game play was exciting especially when running out of power cells.
when i did die the music played but nothing happened it just stay on the screen. i had to hit escape to restart the game i think you need need something to prompt the user rather than the user having to seek out how to restart.
Also when did restart it started from the level i died at with just 1 crystal that made it impossible to proceed.
Apart from that very good game I will add to my collection.